Insulating means



2 Sheets-Sheet 1 Inventor William E Roberts 0 2,.

T ||||||||I| 1|||l| w. E. ROBERTSON INSULATING MEANS Filed June 6 Nov. 6, 1934.

INSULATING MEANS Filed June 6, 195.2 2 sheets-shed 2 Fig.10 B

Invezzfiar William E. Robertson Patented Nov. 6, 1934 "INSULATING MEANS wililiam E. Robertson, Wilm te, 1.1. a sisnor to W. Miner, l no Chicago, 111., a corporation of Delaware Application .l nne 6, 2.932, Serial No. 615,523

5 Claims.

This invention relates to improvements in insulation for closures of cold storage vehicles, such as refrigerator and similar motor trucks, as well as refrigerator cars for railways.

5 The main object of the invention is to provide means for insulating closures of cold storage containers so designed as to effectively prevent seepage through thecrevices between the edges of the closure and the walls of the opening which it serves to close. 7

Another object of the inventionis to provide means for insulating doors or similar closuresof cold storage containers, comprising a composite strip of insulating material applied in such a manner to either the edge of the door orthe cooperating wall of the door opening as to thoroughly seal the crevice betweenthe door and said wall whenthe door is closed, -the'material of the strip bein deformable and compressed between the opposed faces of the walls oft-he door opening and the door to ensure effective insulation.

Still another object of the invention isto provide "insulating means of the character specified in the preceding paragraph, comprising a-str-ip of oompositeinsula-ting material including-portions having bead "formations, wherein the strip is secured to eitherthe door member .or the cooperating wall member -of-the door opening in such a manner thatthe beads protrude slightly from the member to which the-strip is secured so a's'jto' engagetheface of the other member when the door "member is closed, thereby holding the bead portions'of the strip compressed between the two members to eiiectively close the crevicebetween the door-member and the cooperating wall member. 1

A furtherobject of theinvention is to provide insulating means in the form of a strip of-mater ial which is secured :toeither the doormomber or the cooperating wall member of .the doorropening in such :a manner as to prevent seepage between thesstrip land the member to which it is secured, this-object being accomplished by seating the main body portion of the strip withina groove formed-in the faceof the member to which it is applied and holding theistrip firmly within the groove by. a clamping strip or bar,.which presses the material of the sealing strip closelyv against the inner wall-of thegroove, thereby providing a-perfect seal.

Yet anotherobjectof the invention is to .pro- .vide insulation ior sealing. the crevices between the door memberandthe walls of the door-opening of containers composed ofmaterial which will not=have adele-terious-effecit on-aluminurmtherey especial y ad t e som or us .i Q9 nection with con aine bodie aoodo rs f rmed mainly of aluminum.

Other objects of tine invention will morecleerly p a o t descr ptio a d c ims h ro ilafter following. In the drawings, forming a part of this speciflotation, Figu i a horizonta ec i na throu h a hinge don-o dooren do frame .o a aine such .thebool of a motor truck or other vehicle, illustrating my improvements in conn om nther w ihriso oz i wow im lar to i u io o eedj slale showin on w ll f h f am o the c o-moonin and th edge of the cooperating door nernber'with 9 improved insulation applied to the wall of the door frame, the dopr beipg shown closed position: Fi fi i iew; .ilo ron ore moth the door omitteail u t atin oonditi .W r ih door is not in contact with'theinsul n. Fig- 5 ure 4 is a viewjsimilar to. Figure. 2, witli e door frame omitted. Figure 5 elevati nal fview, oo n t ward th e ,inri u e 3,; o t r structure of ,said view being partly br en away toshowtn inte io o i ot uot nl'" ob i 89 view simflarlto Fi ur aii iro io onother embodiment gfthe' invention. Figure '1 is la e larged, horizontal, sectional View, similar to Eigure 1 b t howi e o l th iodiaoen nne ed e portionspf the two, door s,illustrating still .5. other embod me of the invont oi 'F earesir and v9 are hori n a s ctiona view res e t mw o the two a acen ed e. po tions o h i u r d .in F ur r. eac fi ure i l stra h c nd on honthe do rs are m v dep r Figure 10 is a horizontal sectional View through th msoi nngsmp ii u iroioomr ao i are, showin he str p .bofor nepp i ation. Figure 111. is an olevat onal vi w faro t on o th st ip illustrated in .Figuroli). looking .in', an upward di ection ins idlo tn mod fi ure- (A -f r 12182, View 'la o Fis'urelB. umsrr tm st another embodiment .orih mvontio Referrin fir t t theem odiment or themvenom ill stra e in .Eisur s .1 to l-in lu on o thewalls of the closed ,body of a ornot orltru ck is vindieates Jo .Ihe w l 01 .RrQvi-dedwith adoo onomne. 1 losodl a p i of hin ed or 12 and 13. ,Ijhe doors Q12 and 1 3 are suitably up ted or pivota omoremontob' the. osoa h s. lei-+4- ..As shown nE eu e .th ye 't l meeting .edgeef oo .o .thexioor andTlS ar evell mimm olo in lth r .,...,-th -d 1. 'i iswune. nw rm hofore t z o. 13,;s hat the beroiledodeo iao othoreo u will,rrop,or1y,jover-.

lap. Portions of the wall 10 immediately surrounding the door opening form the frame of said opening, the side walls 15-45 of said frame only being shown in the drawings. These walls are preferably hollow, as illustrated. The body of the motor truck may be made of any suitable material and is preferably constructed of metal. In the embodiment of the invention illustrated in Figures 1 to 5 inclusive, my improved insulation is disclosed as applied to the closed body of a motor truck wherein the walls of the body and the doors are formed of aluminum, the insulation being constructed entirely of materials which are inert with respect to corrosive influence on aluminum.

The inner and outer walls of each door 12 and 13 are indicated respectively by 16-16. The vertical edge walls of the door 12 are indicated by 1'7 and 18, and the vertical edge walls of the door 13 by 19 and 20. As clearly shown in Figure 1, the meeting edge walls 18 and 20 of the two doors are inclined or bevelled, such a bevelled design being commonly employed in connection with refrigerator or cold storage containers in order to ensure close contact when the doors are closed. The edges of the walls 17 and 19 of the doors, which are opposed to the vertical side walls 1515 of the door opening, close against these walls when the doors are shut.

In carrying out my invention as illustrated in Figures 1 to 5 inclusive, I employ a composite strip of insulation A for closing the crevices between the meeting edges of the two doors and between the meeting edges of the door frame and each door, the strip A being secured to the edge of one member and being engageable with the cooperating edge of the other member. The strip A, as shown, is clamped within a groove provided in the edge of the member to which it is secured and has beads 2121, which project from said member and are adapted to bear on the opposed face of the adjacent member. The insulation A, which is in the form of a continuous strip, is composed of a plurality of thicknesses of canvas, the canvas forming said strip being preferably continuous and folded upon itself so as to provide the several thicknesses. As clearly shown in Figures 2, 3, and 5, the beads 21-21 are at the opposite vertical side edges of the strip and are formed by looping the canvas material around lengths of hemp rope 2222. Between the two beads 21-2l, the canvas of the insulating strip A is preferably of 7-ply thickness, as shown in Figures 2 and 3. The ends of the opposite side portions of the canvas, which are indicated by 2323 and are looped about the bead sections 2121, overlap the section of the strip A located between the beads, as clearly shown in Figure 2, so as to permit the same to be stitched in place. The stitches, by which side portions 23-23 are secured, preferably also extend through the 7- ply thickness of the strip A, thereby securing all the parts together and holding the strip in shape.

The insulating strip A is shown as being secured to the wall 15 of the door frame, the wall being provided with a vertical groove 24, which accommodates the section of the strip A located between the beads 21-21. As shown, the groove 24 is formed by inwardly offsetting the portion 25 of the wall 15. The groove thus provided has a vertical back wall 26 and spaced side walls 2'727, the corners between the walls 2727 and the wall 26 being rounded, as shown. At the outer edges, the walls 2'7-27 are bevelled, as indicated at 2828. to accommodate the inner portions of the beads 21-21. The strip A is clamped within the groove 24 by means of a vertically disposed clamping member in the form of a flat bar 29, which is of the horizontal cross section shown in Figures 2 and 3. The side faces of the bar 29 are bevelled at the outer ends, as indicated at 30-30, so as to accommodate the inner sections of the beads 2121. The bar 29 is secured to the wall member 15 by means of a plurality of screws 31-31 extending through the bar 29, the strip A, and the back wall 26 of the groove 24, and threaded in openings provided in a vertically disposed clamping strip 32 seated on the rear side of the wall 26. Both the strip 32 and the bar 29 are made of aluminum. The wall 17 of the door 12 is provided with a vertically extending, spaced pair of shallow grooves 3333 within which the beads 2121 of the insulating strip A are seated when the door 12 is closed, as clearly shown in Figure 2. The beads 2121 are preferably of such a size that they will be partially compressed when the door is in closed position, thereby providing a tight seal. The arrangement and design of the strip A located between the meeting bevelled edges 18 and 20 of the two doors 12 and 13 is the same as that of the strip A hereinbefore described and is mounted on the door 12 in a similar manner. The wall 20 of the door 13 is formed with grooves, similar to the grooves 33--33 shown in Figure 4, so as to accommodate the projecting beads 2121 of the strip A.

Referring next to the embodiment of the invention illustrated in Figure 6, 15 indicates the wall of the door frame, and 12 the door which cooperates therewith, these parts corresponding to the wall 15 and the door 12 shown in Figures 2, 3, and 4. The strip of insulating material shown in Figure 6 is of the same general design as the strip of insulating material described in connection with Figures 1 to 5 inclusive and has beads 2121 projecting from the wall 15 and cooperating with the wall 17 of the door 12. The strip A is clamped within a groove 24 of the wall 15 by means of a clamping bar 29, similar to the bar 29 hereinbefore described. The side edges of the bar 29 and the outer portions of the side walls of the groove 24 are bevelled similarly to the corresponding parts shown in Figures 2, 3, and 4 so as to accommodate the inner sections of the beads 2l2l. The embodiment of the invention shown in Figures 6 corresponds to that of Figures 1 to 5 inclusive, with the exception of the wall 17 of the door 12, as shown in Figure 6, is not provided with grooves to accommodate the projecting beads 21-21 of the strip A but presents a continuous flat surface against which the beads are compressed.

Referring next to the embodiment of the invention illustrated in Figures 7 to 11 inclusive, the meeting portions of the doors 12 and 13 are shown. The insulating strip applied to the door 12 and the contour of the edge face of the door 13 are modified so as to ensure close contact between the beads of the insulating strip and the cooperating abutment surfaces of the door 13. As shown in these figures, the door 12 has the end face 118, which corresponds to the end face 18 of the door 12 hereinbefore described, offset to provide a V-shaped, vertically extending groove 124. The groove 124 is defined by a vertical wall 125 parallel to the plane of the door 12 and a wall 126 at right angles to the wall 125. The wall 126 extends to the outer side of the door, as clearly shown in Figures '7 and 8. The

. bead 141.

inner edge wall of the door 13 indicated by 120 and corresponds to the wall 20 of the door 13 hereinbefore described. The wall l20 isprovided with two inclined or bevelled sections 133 and 13 1, which cooperate respectively with the two beads of the insulating strip indicated by B in Figures 7, 8, l0, and 11. The insulating strip B is formed in a manner similar to the strip A hereinbefore described, but the beads along the ver-- tical side edges of the strip B are of different size in cross section. The two beads of the strip B are indicated respectively by 121 and 1&1, the bead 141 being of greater cross sectional size than the bead 121. Each head is formed by a length of hemp rope, which is enclosed by a plurality of layers of canvas formed by folding the canvas strip, of which the exterior of the insulating strip B, is formed, and looping the same about the lengths of rope. The length of rope of the bead 141 is of greater cross section than the length of hemp rope of the bead 121, as clearly shown in Figure 7. The insulating strip B is secured to thedoor 12by means of a clamping bar 129, which holds the strip within the groove 12 1 engaging the strip between the beads 121 and 1 11. The bar 129 has the outer sides thereof bevelled, as indicated at 130 and 131, the bevelled portion 130 accommodating the corresponding side portion of the As shown in Figures 7 and 8, the main portion of the wall 118 projects slightly outwardly beyond the bead 141 of the strip B. The bead 121 at the other edge of the strip B bears on the wall 126 of the groove 124 and has the inner side theres] r of engaging the corresponding vertical side edge of the bar 129. As most clearly shown in Figure 10, the canvas of the strip B is of 8-ply thickness between the beads 121 and 1 11, and where it sur rounds the beads it is of 4-ply thickness. The

c, canvas forming the body portion of the strip B between the beads 121 and 1 11 is overlapped in the manner shown in Figure 10, and the different layers are secured together by stitching indicated by 150150. In Figures 8 and 9, the two doors 12 and 13 are shown separated and the strip of insulating material B in its normal condition. When the doors are brought together in being closed, as shown in Figure 7, the beads 121 and 141 are compressed respectively against the bevelled surfaces or faces 134 and 133 of the door 13. By arranging the bevelled faces 133 and 134 of the door 13 in the manner shown in Figure 7, engagement of the beads of the strip B therewith is ensured without first coming into contact with any other part of the wall 120 of the door 13. This prevents wear of the bead portions of the strip 13.

Referring next to the embodiment of the invention illustrated in Figure 12, the insulating strip is indicated by C and is mounted on the wall 11 of the door frame 10. The manner of mounting the strip C on the door is precisely the same as that illustrated in connection with the embodiment of the invention shown in Figures 1 to 5 inclusive. The strip C is seated within the groove 24 and held therein by means of the clamping strip 29, which is secured by screws 31 cooperating with the clamping strip 32. The strip C is provided with a pair of vertical bead portions 221-- 221 along the opposite sides edges thereof, which cooperate with the adjacent door member in a similar manner that the beads of the strip A cooperate with the door member shown in Figures 1, 2, and 6. As shown in Figure 12, the strip C is composed of Z-ply canvas and the beads 221221 .thereof are formed by two lengths of hemp rope 222-222, each of which is enclosed by canvas sheet material 223 coiled about the rope. The 2-ply canvas strip is continuous and is folded or looped around the lengths of .rope 222-222 and the canvas-223223 covering. the rope so as to hold the same in position. Immediately adjacent to the bead members, the layers-of the 2-ply canvasembrace the projecting ends 224-224 of the two coils of canvas 223- 223. The parts of the composite strip of insulating material C are held together by stitching through the projecting end 224 of each coil 223 and the two layers of the enclosing strip closely adjacent to the corresponding bead 221. The 2-ply section of the strip C is clamped between the rear wall of the groove 24 and the clamping bar 29. The overlapped sections of the 2-ply canvas material and the ends 224--224 are located at opposite sides of the clamping bar so that they do not extend between the 2-ply section of the canvas clamped by the bar 29 against the back wall of the groove 24. The canvas clamped between the bar 29 and the back wall of the groove 24thus presents a section of even thickness so that a tight seal is provided at this point.

I have herein shown and described what I now consider the preferred manner of carrying out my invention, but the same is merely illustrative and I contemplate all changes and modifications that come within the scope of the claims appended hereto.

I claim:

1. In means for insulating closures of containers, the combination with a closure member having an edge face; of a member having an edge face opposed to the edge face of the closure member when the container is closed, the edge face of one of said members having a single groove extending lengthwise thereof, and the opposed edge face of the other member having a pair of laterally spaced shallow grooves extending length- Wise thereof; and a strip of insulating material clamped in said single groove, said strip having beads at'the opposite side edges thereof projecting beyond the member having the single groove and said beads engaging within the grooves of the edge face of the other member.

2. In means for insulating closures of containers, the combination with a closure member having an edge face; of a cooperating member having an edge face opposed to the edge face of the closure member when the container is closed, the edge face of one of said members having a groove extending lengthwise thereof, said groove having opposed side Walls; a strip of insulating material seated in said groove, said strip having beaded edge portions projecting from the face of said grooved member and adapted to engage the edge face of the other member; and a clamping strip within said groove seated on said strip of insulating material and secured to said grooved member, the outer portions of the side edges of said clamping strip and the outer portions of the side walls of said groove being bevelled to accommodate the inner sections of the beads of the strip of insulating material.

3. In means for insulating closures of containers, the combination with a closure member having an edge face; of a member having an edge face in opposed relation to the edge face of the closure member, the edge face of one of said members having a groove therein, defined by a back wall and spaced side Walls, said side walls having the outer portions thereof laterally outwardly offset to provide partial seats; a strip of insulating material having beaded side edges; and a bar for clamping said strip within the groove of said member against the side and back walls of said groove with the major portions of the beads of said strip projecting from the edge face of said grooved member to engage with the edge face of the other member, said clamping bar having partial seats opposed to said partial seats of the walls of said groove said opposed partial seats housing the inner portions of the beads of the strip.

4. In means for insulating closures of containers, the combination with a closure member having an edge face; of a member having an edge face in opposed relation to the edge face of the closure member, the edge face of one of said members having a groove therein and longitudinally extending seats along the outer side edges of said groove; a strip of insulating material comprising a plurality of layers of material, said strip having beaded edges formed by inserts between the layers of said strip, the inner portions of said beads being seated in said seats and the portion between said beads being seated in said groove proper; and a bar for clamping said strip Within the groove of said member against the side and back walls of said groove with the major portions of said beads of the strip projecting from the edge face of said grooved member to engage with the edge face of the other member, the outer corners of said bar being cut away to accommodate the inner portions of said beads.

5. In means for insulating closures of containers, the combination with a closure member having an edge face; of a member having an edge face in opposed relation to said edge face of the closure, the edge face of one of said members having flat portions and the edge face of the other member having a longitudinal groove defined by side walls and a back wall; a strip of insulation having the longitudinal side edges thereof beaded; and a bar for clamping said strip in said groove against said back and side walls with the major portions of the beads of said strip projecting from the grooved member and engaging said flat portions of the other member, the outer corners of said bar and the outer sections of said side walls of the groove being cut away to fit the inner portions of said beads.

WILLIAM E. ROBERTSON. 

